1. This product is very suitable for DIY simple mono amplifier, with builtin boost circuit, very suitable for upgrading or making batterypowered outdoor speakers, pullrod speakers, and mobile speakers2. Support Wuzhi Audio APP, modify Bluetooth name, password setting, prompt sound volume adjustment, on/off prompt sound, sleep music, firmware upgrade, etc.3. Pairing function, true wireless function allows two sets of speakers to be combined into left and right channel pairing, with a stronger sense of spatial positioning4. Protection mechanism: input antireverse connection, overtemperature, overcurrent, short circuit, antistatic protection5. APP has a timer shutdown functionColour:blackMaterial:PCB+ComponentsModel: 1001UName: 100W mono Bluetooth amplifier board module with boost and bass and treble adjustmentAmplifier chip: TPA3116D2Bluetooth version: 5.3Bluetooth transmission distance: 15 metersAudio input: Bluetooth AUX U disk USB sound cardAudio output: mono 100WApplicable power supply: DC924V, 4A (not connected to AC), suitable for 7.4V12V21V and other batteries, not suitable for 24V batteries, full charge cause overvoltageApplicable speakers: 20100W, 38Due to different batches, there may be differences in product appearance and printed text, which not affect usePackage Contents:1 * Bluetooth Amplifier Board KitOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/ 13cm.